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KM500T Kalkwasser Stirrer

Kalkwasser - Translates from the German for limewater and is a solution made by dissolving Calcium Hydroxide in water. The resultant fresh solution is alkaline with a pH of 12.4 and contains a ready supply of both Calcium ions and Carbonate ions.

The solution reacts readily with CO2 in the atmosphere to form calcium carbonate and so it must be made in a relatively air tight environment which is where the kalkwasser stirrer comes in to play.

The KM500T is the standard stirrer suitable for tanks up to 1500 lts - 350 UK gallons - 400 USG and will produce up to 5lt - 1.3 US Gallons of kalkwasser per hour.


Technical Data:

  • KM500 Stirrer: Article No. 87001000
  • Can be stood on the outside of the aquarium or sump.
  • Must gravity feed back into the water supply.
  • Feed with RO water from a reservoir or direct from the RO unit.
  • Use in conjunction with a top up system.
  • Supplied with 500ml tub of RowaKalk.
  • Makes up to 5lt - 1.3 USG of kalkwasser per hour.


  • 150mm x 150mm x 480mm (LxWxH)
  • L 6" W 6" H 19". 
  • 7.5V 3 watts consumption.



  • Suitable for aquariums up to 1500 lts - 350 UK gallons - 400 USG